Histopathology of Trypanorhyncha plerocercoids (Cestodes) in some Marine Fish from Waters of the Arabian Gulf

Abstract

ABSTRACT. In March, 1997, 150 fresh fish specimens from the waters of Arabian Gulf, 95 of fish belonging to Groupers, Epinephelus aerolatus (local name Simman) and the other 55 fish specimens belonging to Emperor lethrinus sp. (local name Sheiry) were subjected to parasitological examination. Free floriceps Trypanorhyncha plerocercoids larvae were found in the flesh, while encysted forms of these larvae were found in the body cavity and mesenteries. The incidence of infection was higher in the Lethrinus sp. (34.5%) than Epinephelus sp. (24.2%). Intensity of infestation in the muscular tissues was higher in the muscles of the caudal peduncle; head and around the vertebral column than in the abdomen and trunk regions. Histopathology of the infected muscular tissues showed pronounced tissues destruction with intensive inflammatory reaction characterized by focal degenerative and necrotic changes with evidence of hemorrhages and cellular infiltration mainly lymphocytes. Over 350 encysted plerocercoids blastocysts of floriceps sp. could be counted from the peritoneal cavity and around the internal organs in heavy infested fishes with signs of fibrosis and adhesion.

Trypanorhynch Cestodes Infecting Mediterranean Sea Fishes, Egypt: Callitetrarhynchus gracilis Larvae (Pintner, 1931) as a Bio-indicator of Heavy Metals Pollution

“…In the present study, the prevalence of Trypanorhynch cestode larvae was 42% among the examined three fish species.This finding was lower than that reported by [22] (59.06%) among other Mediterranean Sea fishes in Egypt while it was higher than that recorded from the Red Sea [21] (20%) in Egypt, [15] ( 24.3 % in mesenteries and 1.26 % of the flesh of the examined fishes) in [23] from the Arabian Gulf (34.5% in Lethrinus sp. and 24.2% In Epinephelus sp) in Saudi Arabia.…”

A Study on the Pathological Effects of Trypanorhyncha Cestodes in Dusky Groupers Epinephelus marginatus from the Canary Islands

“…Numerous studies have detailed the presence and morphological features of Trypanorhyncha species infecting groupers [3,4,7,9,[24][25][26]28,[34][35][36]. Notwithstanding, information on the pathological effects produced by these parasites remains limited.…”

“…from the Arabian Gulf, the prevalence of P. musculicola and Floriceps sp. was around 15% [25] and 24.2% [26], respectively. Similarly, in white groupers, Epinephelus aeneus, and dusky groupers from the Turkish Mediterranean coast, the prevalence of Grillotia sp.…”

“…Inflammation, necrosis and fibrosis of the skeletal muscle, abdominal cavity, mesentery and liver have also been reported in Areolate groupers Epinephelus aerolatus infected with Floriceps sp. [26]. The presence and gross presentation of trypanorhynch larvae in Epinephelus spp.…”

Biological and Ecological Features of Poecilancistrum Sp. Plerocercoid (Cestoda: Trypanorhyncha) Infection of Arabian Sea Meager Argyrosomus heinii (Steindachner, 1907)

“…These fish have high commercial importance in the tropical and subtropical waters around the world, where they usually are abundant in estuaries [2,3]. They are frequently infected with cestodes of the order Trypanoryncha Diesing, 1863 [4], which is a cosmopolitan group of marine cestodes [5]. Trypanoryncha comprises about 270 species [6].…”